A long-duration heat wave is taking shape over the western half of the U.S. and forecast to stick around in the days ahead.

Editor’s note (3/21/26): Four stations (two in Arizona and two in California) recorded temperatures of 112 degrees Fahrenheit (44.4 degrees Celsius) on Friday, March 20, besting the all-time U.S.

An oppressive heat wave across much of the western United States had cities and their residents sweltering through conditions this weekend that are normally more common at the height of summer. The ...

Meteorologists are reaching for superlatives to describe an oncoming heat wave so intense and rare for this time of year that it could leave some locations shattering their all-time temperature ...

It feels like summertime in March across much of the western United States this week, as an extraordinary, early heat wave sends temperatures skyrocketing in California and the Southwest. Subscribe to ...